2008•Rejiagong gongyiRequires access

Influence of Cooling Rate on Microstructure and Properties of New-type Bainite Steel

Bin Ji

Abstract

The microstructure and properties of a new-type bainite steel were studied under different cooling rate.The results show that the microstructure under air cooling after austenitizing is lath bainite and a little amount of granular bainite;the tensile strength is 1380 MPa,the impact toughness is 99 J/cm2,δ=15.75%,ψ=58%,the hardness is 42.2 HRC,the new-type steel have a good combination mechanical properties.

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Key concepts: Bainite, Microstructure, Lath, Materials science, Austempering, Metallurgy, Austenite, Ultimate tensile strength